Your counterpoint was Rhodesia, which was not a war where a hostile invader besieged a population into surrender.
My point is that factually it was.
It's not a popular view outside of certain whitish circles, it's not a pleasant view, yet the structure of this war was mostly intervention, not inner insurgency.
And the economic sanctions (or blockade) wouldn't have forced Rhodesian government to agree to a negotiated end to the conflict if they hadn't seen the writing on the wall - that without the support of the US and South-Africa, they were absolutely going to lose the military conflict
As far as I know - they were not.
It was a question of quality of life. They have enough resources to stand, though they'll have to sacrifice too much in quality of life - and a quality of life was what they fought for.
And the same is for South-Africa - it was forced to surrender by (factually) blockade/sanctions, not military actions (though it was less a war at all).
Now, having thought about this more, we could make a case where colonies are treated more like medieval castles/towns, which did sometimes surrender due to sieges, though it wasn't a given. But that sort of thing mostly happened because to the local population it didn't matter who their lord was - one noble was largely same as any other - and things wouldn't generally change for them much at all. Whereas when religion came into play (Crusaders, 30-year war), surrendering became lot rarer and atrocities became commonplace. Which might be a better analogue for Aurora, where aliens won't blink an eye(-stalk) before committing nuclear holocaust on other species.
Yep.
It's possible to implement some level of vectored xenophobia, based on weather or not your enemy's empire has the same species as citizens or not and what is your and their level of general xenophobia, but it looks like quite complicated. I'll be happy if Steve will implement it, yet I'm not in optimistic mood about this possibility.
Though I think the danger rating doesn't affect the PPV needs of colonies. Connecting those could be useful to give the system little more meat.
That's my point exactly.
Because to calculate minerals need for civilian economy... I'm not in optimistic mood about this possibility at all.